ABSTRACT
BACKGROUND: Digital impression technology has been widely used in the oral field. Compared with traditional impression technology, it is more convenient and accurate. OBJECTIVE: To explore the application of digital prosthesis for repairing palatal fistula in rabbits. METHODS: The rabbit models of palatal fistula were established by surgery. One month later, 10 rabbit models of palatal fistula were scanned by digital intraoral scanning system. The medical silicone rubber prosthesis for palatal fistula was manufactured by digital impression technology and digital design. After wearing the prosthesis, SUN LB, LAN YY, ZHOU HY, HUY. Application of digital prosthesis In me repair of palatal fistula In rabbits. Zhongguo Zuzhi Gongcheng Yanjiu. 2020;24(14):2192-2196. DPI:10.3969/j.issn.2095-4344.2228 the accuracy, retention and sealing properties of the prosthesis were examined. The study was approved by the Laboratory Animal Ethical Committee of Hospital of Stomatology, Southwest Medical University. RESULTS AND CONCLUSION: After digital prosthesis repaired palatal fistula, the accuracy, retention and sealing properties of the prosthesis were good. To conclude, the digital prosthesis for palatal fistula repair by digital impression technology achieves accurate repair, and has certain clinical values.
ABSTRACT
BACKGROUND: Polyetheretherketone (PEEK) and Its composites have a unique set of properties, and 3D printing technology can customize personalized Implants according to the patient's condition, and the effective combination of the two plays a significant role In the field of bone repair. OBJECTIVE: To summarize the application status of PEEK and Its composite combined with 3D printing technology In the field of bone repair, and to further predict the application prospects of the effective combination of the two. METHODS: CNKI, PubMed, and Web of Science databases were retrieved with the search terms “PEEK, PEEK composites, bone defect repair, PEEK Implants, PEEK 3D printing, prosthodontlcs” in English and Chinese, respectively, for the articles published from April 1995 to April 2019. Totally 147 articles were searched, and finally 51 eligible articles were enrolled for review in accordance with the inclusion and exclusion criteria. RESULTS AND CONCLUSION: Biologically active materials and the particles or fibers with Improved mechanical properties were Introduced Into the PEEK matrix to prepare its composite. 3D printing technology was used to precisely customize Implants that are highly matched to the patient's defect. The Implants with good biocompatibility, bioactlvity, and mechanical properties exhibited good therapeutic effects In the repair of skull, jaw, spine, lumbar vertebra, artificial joint and oral defects. They Improved patient satisfaction after treatment. This article summarized the application of PEEK, its composite and 3D printing technology In the repair of various bone defects, and expressed its views on the application and prospect of personalized PEEK implants or prostheses prepared with 3D printing technology.
ABSTRACT
The purpose of this study was to evaluate the shear bond strengths between various hybrid computer-aided design (CAD)/computer-aided manufacturing (CAM) restorative materials and repairing resin. Two resin network-based hybrid (Lava Ultimate and Polyglass), one ceramic framework-based hybrid (Enamic), and one zirconia (Zenotec Zr bridge) CAD/CAM restorative materials were used in this study. The shear bond strength test and failure modes of four experimental groups designated LUS (Lava Ultimate), ENA (Enamic), PGB (Polyglass), and ZBR (zirconia control group) were characterized in this study. The hybrid CAD/CAM restorative materials showed stronger shear bond strengths in the sequence of PGB, LUS, and ENA (P < 0.05). The shear bond strengths of PGB and LUS groups showed significantly higher than those of ZBR (P < 0.05), while ENA did not show any significant difference from ZBR (P < 0.05). The PEG and LUS groups mostly exhibited cohesive failure, but the ENA and ZBR groups predominantly showed adhesive failure. Therefore, resin network-based hybrid CAD/CAM restorative materials such as Lava Ultimate and Polyglass should be more useful for intra-oral repairs.